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Update README.IPv6 to match what is in 2.3.0
IPv6 is no longer provided by external patches - all has been integrated. Document that fact, point at the new configuration options, and at potential caveats. Acked-by: David Sommerseth <davids@redhat.com> Message-Id: 1359113954-25768-1-git-send-email-gert@greenie.muc.de URL: http://article.gmane.org/gmane.network.openvpn.devel/7305 Signed-off-by: Gert Doering <gert@greenie.muc.de>
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README.IPv6
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README.IPv6
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Since 2.3.0, OpenVPN officially supports IPv6, and all widely used
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patches floating around for older versions have been integrated.
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IPv6 payload support
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--------------------
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Latest IPv6 payload support code and documentation can be found from here:
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This is for "IPv6 inside OpenVPN", with server-pushed IPv6 configuration
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on the client, and support for IPv6 configuration on the tun/tap interface
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from within the openvpn config.
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http://www.greenie.net/ipv6/openvpn.html
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The code in 2.3.0 supersedes the IPv6 payload patches from Gert Doering,
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formerly located at http://www.greenie.net/ipv6/openvpn.html
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For TODO list, see TODO.IPv6.
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Gert Doering, 31.12.2009
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The following options have been added to handle IPv6 configuration,
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analogous to their IPv4 counterparts (--server <-> --server-ipv6, etc.)
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- server-ipv6
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- ifconfig-ipv6
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- ifconfig-ipv6-pool
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- ifconfig-ipv6-push
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- route-ipv6
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- iroute-ipv6
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see "man openvpn" for details how they are used.
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IPv6 transport support
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----------------------
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[ Last updated: 25-Mar-2011. ]
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This is to enable OpenVPN peers or client/servers to talk to each other
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over an IPv6 network ("OpenVPN over IPv6").
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OpenVPN-2.1 over UDP6/TCP6 README for ipv6-0.4.x patch releases:
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( --udp6 and --tcp6-{client,server} )
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The code in 2.3.0 supersedes the IPv6 transport patches from JuanJo Ciarlante,
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formerly located at http://github.com/jjo/openvpn-ipv6
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* Availability
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Source code under GPLv2 from http://github.com/jjo/openvpn-ipv6
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Distro ready repos/packages:
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o Debian sid official repo, by Alberto Gonzalez Iniesta,
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starting from openvpn_2.1~rc20-2
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o Gentoo official portage tree, by Marcel Pennewiss:
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- https://bugs.gentoo.org/show_bug.cgi?id=287896
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o Ubuntu package, by Bernhard Schmidt:
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- https://launchpad.net/~berni/+archive/ipv6/+packages
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o Freetz.org, milestone freetz-1.2
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- http://trac.freetz.org/milestone/freetz-1.2
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Use the following options to select IPv6 transport:
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* Status:
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o OK:
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- upd6,tcp6: GNU/Linux, win32, openbsd-4.7, freebsd-8.1
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- udp4->upd6,tcp4->tcp6 (ipv4/6 mapped): GNU/Linux
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(gives a warning on local!=remote proto matching)
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o NOT:
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- win32: tcp4->tcp6 (ipv4/6 mapped) fails w/connection refused
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o NOT tested:
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- mgmt console
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--proto udp6
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--proto tcp6-client
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--proto tcp6-server
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--proto tcp6 --client / --proto tcp6 --server
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* Build setup:
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./configure --enable-ipv6 (by default)
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On systems that permit IPv4 connections on IPv6 sockets (Linux by
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default, FreeBSD and NetBSD if you turn off the "v6only" sysctl by
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running "sysctl -w net.inet6.ip6.v6only=0"), an OpenVPN server can
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handle IPv4 connections on the IPv6 socket as well, making it a true
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dual-stacked server.
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* Usage:
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For IPv6 just specify "-p upd6" an proper IPv6 hostnames, adapting the example
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from man page ...
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On other systems, as of 2.3.0, you need to run separate server instances
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for IPv4 and IPv6.
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On may:
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openvpn --proto udp6 --remote <june_IPv6_addr> --dev tun1 \
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--ifconfig 10.4.0.1 10.4.0.2 --verb 5 --secret key
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The client side code is not really "dual-stacked" yet, as it does not
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automatically try both address families when connecting to a dual-stacked
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server. For now, you can achieve this with <connection> stanzas in your
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openvpn config:
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On june:
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openvpn --proto udp6 --remote <may_IPv6_addr> --dev tun1 \
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--ifconfig 10.4.0.2 10.4.0.1 --verb 5 --secret key
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Same for --proto tcp6-client, tcp6-server.
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* Main code changes summary:
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- socket.h: New struct openvpn_sockaddr type that holds sockaddrs and pktinfo,
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(here I omitted #ifdef USE_PF_xxxx, see socket.h )
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struct openvpn_sockaddr {
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union {
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struct sockaddr sa;
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struct sockaddr_in in;
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struct sockaddr_in6 in6;
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} addr;
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};
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struct link_socket_addr
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{
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struct openvpn_sockaddr local;
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struct openvpn_sockaddr remote;
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struct openvpn_sockaddr actual;
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};
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PRO: allows simple type overloading: local.addr.sa, local.addr.in, local.addr.in6 ... etc
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(also local.pi.in and local.pi.in6)
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- several function prototypes moved from sockaddr_in to openvpn_sockaddr
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- several new sockaddr functions needed to "generalize" AF_xxxx operations:
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addr_copy(), addr_zero(), ...etc
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proto_is_udp(), proto_is_dgram(), proto_is_net()
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* For TODO list, see TODO.IPv6
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--
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JuanJo Ciarlante jjo () google () com ............................
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: :
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. Linux IP Aliasing author .
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. Modular algo (AES et all) support for FreeSWAN/OpenSWAN author .
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. OpenVPN over IPv6 support .
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:...... plus other scattered free software bits in the wild ...:
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<connection>
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remote my.dual.stack.server 1194 udp6
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</connection>
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<connection>
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remote my.dual.stack.server 1194 udp
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</connection>
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